<template>
  <li
    :class="isActive ? 'active' : ''"
    @mouseenter="mouseChange('enter')"
    @mouseleave="mouseChange('leave')"
  >
    <label>
      <input type="checkbox" :checked="done" @click="changeDone(id)" />
      <span>{{ todo }}</span>
    </label>
    <button class="btn btn-danger" :id="id" @click="deleteTodo(id)">
      删除
    </button>
  </li>
</template>

<script>
export default {
  name: "Item",
  props: ["id", "todo", "done", "deleteTodo", "changeDone"],
  data() {
    return {
      isActive: false,
    };
  },
  methods: {
    // 鼠标移入移出事件
    mouseChange(type) {
      this.isActive = type === "enter";
      //在这里判断传递的参数是否全等于'enter' 因为比较返回的是布尔值 所有直接可以赋值修改isActive
    },
  },
  mounted() {},
};
</script>

<style scoped>
/*item*/
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  float: right;
  display: none;
  margin-top: 3px;
}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}
/* 定义list鼠标移入移出样式 */
li.active {
  background: #d9d3b9;
}
li.active button {
  display: block;
}
</style>
